C++ Program to reverse a number using pointers


In this program, You will learn how to reverse a number using pointers in C++.


123 => 321

456 => 654


Example: How to reverse a number using pointers in C++

Run it Now
#include<iostream>
using namespace std;

int main() {

    int n, r, rev = 0;
    int *num;

    cout << "Enter a number : ";
    cin >> n;

    num = &n;

    while (*num > 0) {
        r = *num % 10;
        rev = rev * 10 + r;
        *num = *num / 10;
    }

    cout << "\nReverse number is : " << rev;

    return 0;
}

Output:

Enter a number : 103
Reverse number is : 301